| 摘要 |
Regenerated cellulose threads, films and like products having a reduced water imbibition are produced by applying to the products a compound containing at least two 2 : 3-epoxypropyl groups and then heating to bring about reaction between the regenerated cellulose and the epoxy compound. The regenerated cellulose products may be treated with an aqueous solution of the 2 : 3-epoxypropyl compound, e.g. bis-(2 : 3-epoxypropyl)ethyl amine or tris-(2 : 3-epoxypropyl)amine, dried and then heated at 70-150 DEG C. for 5 minutes to 12 hours. Alternatively the impregnated products may be heated in a closed vessel to effect the epoxide-cellulose reaction and then washed and dried. The process may be modified by using a compound containing two or more 3-chloro-2-hydroxypropyl groups, e.g. tris-(3-chloro-2-hydroxypropyl)amine, the heat treatment being then effected in the presence of alkali to convert the 3-chloro-2-hydroxypropyl groups into 2 : 3-epoxypropyl groups on the products. Compounds containing one or more 2 : 3-epoxypropyl groups as well as 3-chloro-2-hydroxypropyl groups, e.g. N,N1-bis(2 : 3-epoxypropyl)-tetra-(3-chloro-2-hydroxypropyl)ethylene diammonium chloride, may also be used. In one example, staple fibres of "never-dried" viscose rayon are treated. Specifications 471,880, [Group IV], and 795,356 are referred to.
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